Automatic boiler-pressure regulator.



No. 784,121. PATENTED MAR. 7, 1905 H. E. PARSON. AUTOMATIC BUTLER PRESSURE REGULATOR.

APPLIOATIUN FILED NOV.18, 1903.

2 SHEETS-SHEET 1.

PATENTED MAR. 7, 1905.

H. E. PARSON.

AUTOMATIC BOILER PRESSURE REGULATOR.

APPLICATION FILED NOV.18. 1903.

2 SHEETS-SHEBT 2.

W m m a -weighted lever.

no. veelal.

NiTnD STATES Patented March '7, 1905.

PATENT vinca.

./\l...l'll"()lillA'lllllID` BONER-PRESSURE REGULATOR.

SPECIFICATION' forming part of Letters Patent No. 784,121, dated March 7, 1905.

Application led November 18,1903. Serial No. 181,722.

To (ir/ZZ whom it nm/ l/ concern.-

Be it known that I, HENRY EDWIN PARsoN, a citizen of the United States of America, and a resident of and post-oili'ce address being 320 Broadway, New York city, State of New York, have invented certain new and useful Improvements in Automatic Boiler-Pressure Regula tors, of which the following is a specification.

This invention relates to improvements in an automatic boiler-pressure regulator used, primarily, in the automatic boiler-pressure regulator shown in my Patent No. 742,128, bearing date ot' October 20, 1903.

The object of my invention is to provide an automatic valve structure which will operate with as little friction as possible when a desired change ot' boiler-pressure occurs and yet be insensible to minute changes of boile1pressure due to engine pulsations, the object being to maintain the steam-pressure in the boiler as nearly uniform as possible.

A further object of the invention is to employ a diaphragm, a valve, and a stem connecting these two elements, the means employed for coupling' the stem being arranged in such manner as will permit oi a slight displacement of the alinement of the diaphragm and yet not bind the valve in its case and prevent its tree movement.

The invention also comprehends improvevments in the specilic details of construction and arrangement ot' parts whereby I am en- 'abled to produce a compact, durable, and neat construction, as well as one which can be conveniently dismantled for the repairing ol the parts.

ln the drawings, Figure 1 is a vertical section of my improved ieg'iilating'\'alve. Fig. 2 is a central transverse section o'lg the same. Fig. 3 is a detail bottom plan View. Fig. et is a detail vertical section taken through the Fig. 5 is a detail top plan view ot' the valve. Fig. 6 is a horizontal section on the line 6 6 o't` Fig. 1.

lhe same numerals refer to like parts in all the iigures, wherein 1 represents a hollow base, in which is mounted the weighted lever 2. The lever 2 is fulcrumed at 3 and has lormed at one end a tl-shaped notch 4L, while at its opposite end a weight 5 is suspended.

A. valve-casing 6 is Afastened to the top o'l the base 1 by screws 7, and between the said casing and the base is clamped a dlaphragni 8.

Clamps 9 and 1() impinge on the diaphragm,l

and they are held together by the threaded end 1l ot' a bolt 12. The clamp 10 has a hollow reduced depending projection 13 to re ceive a hardened block 15, prcwided on its under side with a knife-edge 16, which lits in the V-shapcd notch a. The notch is somewhat wider than the body olI the kni le-edge to permit of the lever being roch ed without binding the parts.

The bolt l2 square, as shown in Fig. 6, except that its corners are cut oliA and ground to a circle, so as to llt into and be guided by the cylindrical casing 6. lhe square bolt l2, iitted within the circular casing 6, leaves steamu passages snrrouinling the holt and connnnnieating' between the casing 6 and the upper side of the (.liaphragm 8. ln the top of the bolt 12 there is a circular opening' i6, and through the bolt there is also a horizontal hole 1.7, which ente-rs the circular hole 16. Vithin the vertical hole 16 is located a nut 18, which lits loosely therein, and through the lower end of which and through the bolt there passes a pin 19.

The valve 24 (shown in plan in Fig. 5) is mounted to vertically recipro'zate against a seat 26, lornicd on the inner wall ol the upper part oi the casing (i. 'lhe valve is formed with a ground face 27, having a vertical groove 28, and on the opposite side there is a vertical groove 21, extending from the top to the bottom of the valve, while its sides opposite the lace 27 are cutaway to `lorm steampassages around the valve and to maintain the valve upon its seat by steam-pressure. A screw 29, having` a reduced end 30, is tapped into the side ot' the extension 6"', the said extension entering the notch 28", which prevents the valve being turned.

An inlet-opening 33 is formed in the side olI the casing 6, and through this opening steam is admitted Alrom the boiler to act on the dia-A phragm. Beyond the valve-seat 26 the casing 6 has a projection provided with a channel 36, leading to a main operatingwalve, (not shown,) and in the same Vprojection and adjacent the channel 36 is another channel, 38, which communicates with an exhanst-pip i- IOO Steam enters the opening 33 and acting on the diaphragm depresses the end of the lever and rocks the latter on its fulcrum 3.

As the lever is rocked under the influence of the steampressure, as clearly pointed out in the before-mentioned patent, obviously the apex ot' the V-shaped notch will move in' the arc ot' a circle ot` which the pivot 3 is the center, and as the knife-edge 16 rests therein it will likewise follow the same arc. The edges of the diaphragm being tixed and the knife-edge traveling in the arc of a circle, the axis ot' the bolt 12 is thrown out of the perpendicular, and were it not for the loose connection between the rod 2Q, the bolt 1Q, and the valve 24 the latter would bind with every motion of the diaphragm. In other words, the connections between these members form aiiniversal joint which allows the valve to freely and positively move in contact with its seat irrespective of any unusual twist or tilting of the diaphragm. The diaphragm having descended, it Jfollows that the top ot' the valve will uncover the port 36, which admits boiler-pressure to the main valve. (Not shown.) Then the boiler-pressure declines in consequence of more steam being used than is being generated, the weight 5 will force the diaphragm upward against the steampressure and raise the valve Z4 so as to close the channel 36 with the valve. As the pressure continues to decline by the excessive use of steam the weight 5 will raise the diaphragm 8 above its horizontal position and raise the valve 24 until the groove Q8 is brought to register with both the channels 36 and 38 and form acominiinicating channel between them.

The nicety ot adjustment at the point ot' contact between the knife-edge 16 and. the V- shaped groove 4 serves to prevent undue friction at this point and insures the slightest movement of the weighted lever being' communicated to the valve. Furthermore, the connection between the valve and the diaphragm is such that any movement, from the ininutest impulse to the sevei'est blow due to abnormal conditions ot' boiler-pressure, will not bind the valve, and thus prevent its free movement; nor is it absolutely necessary that the two pins 17 and 23 be precisely positioned relative to the tip-and-down movement of the lever 2 or that the end 30 ot' the bolt 29 tit its groove 28 accurately. since the universal connection will allow ot' any movement between these parts. This feature is ot' the utmostiniportance in an apparatus of this type, as it serves the purpose of permitting quick and convenientassembling of the parts by unskilled workmen and amply aords provision for tree movement otl the valve in case of wear or any undue jar.

Having thus described my I claim, and desire to secure by ent, is

1. An apparatus ot' invention, what Letters Patthe class described coml prising a casing provided with inlet and outl let ports, and an exhaust-port, a valve adapted i to move over the outlet and exhaust ports, and held against the ports by steam-pressure and adapted to establish communication between the interior of the casing and the outl let-port or between the outlet-port and the exhaust-port, a pressureresisting means,

means acting on the pressure-resisting means and actuated by boiler-pressure, and a universal connection between the means actuated by boiler-pressure and the valve, whereby the movement of the valve-actuating mechanism will have no tendency to lift the valve Jfrom its seat.

2. An apparatus ot' the class described comprising a casing provided with inlet and outl let ports and an exhaust-port, avalve adapted l to move over the outlet and exhaust ports and il held against the ports by steam-pressure and y adapted to establish communication between the interior of the casing and the outlet-port or between the outlet-port and the exhaustport, a diaphragm actuated by boiler-pressure and a universal connection between said diaphragm and the valve whereby said diaphragm will have no tendency to litt the valve Jfrom its seat.

3. An apparatus ot' the class described comprising a casing having inlet and outlet ports and an exhaust-port, a valve adapted to move over the outlet and exhaust ports and held against the ports by steam-pressure and adapted to establish communication between the outlet-port and interioi' of the casing or between the outlet-port and the exhaust-port, means I actuated by boiler-pressure, mechanism connecting said means and the valve permitting the former to be moved at right angles to the axis otl the valve without affecting the alined `movement of the valve, and means operating against the means actuated by boiler-pressa re to resist said pressure. l L1. An apparatus of the class described 4comprising a casing havinginlet and outlet ports, l and an exhaust-port, a valve adapted to move over the outlet and exhaust ports and against the ports by steam-pressu re and adapted to establish communication between the interior ot' the casing and the outlet-port or bel tween the outlet-,port and exhaust-port, a lel ver, means actuated by the boiler pressure l which moves the lever, mechanism connecting said means and the valve permitting the means to be moved from a plane at right angle to the axis of the valve without atecting the desired movement of the valve.

5. An apparatus of the class described comprising a casing provided with inlet and outlet ports and an exhaust-port, a valve adapted to move over the outlet and exhaust ports and held against the ports by steam-pressure and adaptedto establish communication `between the interior of the casing and the outlet-port l or between the outlet-port and exhaust-port,

reader nieans actuated by boiler-pressure and mechanism connecti ng said pressure-actuated means and the valve, permitting' the pressure-actuating means to be moved in a plane at right angles to the valve without affecting the desired moven ment oi the valve, a knife-edge formed on said pressure-actuating means, and a weig'hted lever provided with a notch in which said knife-edge tits.

6. An apparatus of the class described comprising' a casing provided with inlet and outlet ports and an exhaust-port, a vertically-movable valve adapted to move over the outlet and exhaust ports and held against the ports by steampressure and adapted to establish communication between the interior ot' the casing and the outlet-port or between the outlet-port and the exhaust port, means actuated by boiler-pressure, a knife-edge on said means, a universal connection between said means and the valve for permitting the means to tilt without affecting the vertical movement of the valve and a weighted lever provided with a notch into which the knife-edge fits.

7. An apparatus of the class described comprising a casing provided with inlet and outlet ports and an exhaustJport, a verticallyanovable valve adapted to move over the outlet and exhaust ports and held against the ports by steam-pressure and adapted to establish communication between the interior of the casing and the outletport, or between the outlet-port and the exhaust-port, the valve being provided w`ith a groove, a pin engaging the groove, a notch formed inthe face of the valve, a diaphragm provided with a knifen edge, a rod between the valve and the diaphragm, a pin connecting the rod with the diaphragm and a second pin connecting' the rod with the valve, said pins being' arranged at right angles to each other, and a weighted lever provided with a V-shaped notch to receive the l{nife-edge.

8. In a regulator for steam-boilers, the combination with a casing' having inlet and outlet ports and an exhaust-port, a valve adapted to move over the outlet and exhaust `ports and held against the ports by steam-pressure and adapted to establish communication between the interior ol" the casing and the outlet-port, or between the outlet-port and the exhaust-port, means actuated by boiler-pres sure for moving' the valve-and a universal connection between said means and the valve.

9. In an automatic rcg'ulator'lor steam-boilers, the combination with a lever provided with means for depressing one of its ends, means actuated by boiler-pressure in one direction and connected to and actuated in the opposite direction by the lever, a casing provided with inlet and outlet ports and an exhaust-port, a valve adapted to move over the outlet and exhaust ports and held against the ports by steam-pressure and adapted to establish communication between the interior of the casing and the outlet-port or between the outlet-port and the exhaust-port, and a universal connection connecting the valve to the device actuated by boiler-} 3ressure.

10. In an automatic regulator for steamboilers, the combination with a pivoted lever, of means for depressing' one end oi the lever, a casing having inlet and outlet ports and an exhaust-port, a valve adapted to move over the outlet and exhaust ports and held against the ports by steam-pressure and adapted to establish communication between the interior of the easing and the outletport or between the outlet-port and the exhaust-port, a dia phragm in the casing', a connection between the lower side of the diaphragm and one end ot' the lever and a universal connection between the valve and the diaphragm.

11. A pivoted lever provided with means 'for moving' one end thereof and provided at the other end with a transverse notch, a easing provided with inlet and outlet ports-and an exhaust-port, a valve adapted to move over the outlet and exhaust ports and held against the ports by steam-pressure, and adapted to establish communication between the interior of the casing and the outlet-port or between the outlet-port and the exhaust-port, a iiexible diaphragm actuated by steam-pressure in one direction, a knife-edge secured to the center of the diaphragm and standing in the notch of the pivoted lever and a universal connection between the diaphragm and the valve.

Signed by me at New York, N. Y., this 13th day 0i November, 1903.

HENRY EDVN PARSON.

W'itnesses:

Guo. L. PnnN'rrss, EMMA W. FINLAYsoN. 

